When I have a lot of sexual excitement and sexual energy in my lower chakra, what do I need to do to stop this? Do I channel the energy to higher chakra?
Isn't the goal to not get sexually excited in order for the semen to get transmuted into Ojas?
you can not just stop having sexual thoughts, you have to replace the sexual thoughts with something else.
But you should not depend upon step 5 etc, actually step3 is what, we should depend upon in mid-way. And Ultimately best is to depend upon meditation. When you will have total command over your mind and thoughts, then you will not need any of steps, even when you see a nude opposite-sex person in front of you, your mind will neither be attracted towards it, nor averse to it, it will be having a unaffected neutral attitude towards it. When you achieve total control of your mind, soul - then your mind will not wander until you deliberately turn your will power towards sexual act as a loving duty/dharma of grihastha(householder layman) - for creating progeny within marraige ; but it will not wander just for wasting the precious sperm.
see also: - How do I control and slay indriyas (senses)?
You have to do some type of Yoga to control lust. The easiest method is to repeat the name of God.
A DEVOTEE: "Sir, should one first practise discrimination to attain self-control?"
MASTER: "That is also a path. It is called the path of vichara, reasoning. But the inner organs (Mind (manas), intelligence (buddhi), mind-stuff (chitta), and ego (ahamkara).) are brought under control naturally through the path of devotion as well. It is rather easily accomplished that way. Sense pleasures appear more and more tasteless as love for God grows. Can carnal pleasure attract a grief-stricken man and woman the day their child has died?"
DEVOTEE: "How can I develop love for God?"
MASTER: "Repeat His name, and sins will disappear. Thus you will destroy lust, anger, the desire for creature comforts, and so on."
DEVOTEE: "How can I take delight in God's name?"
MASTER: "Pray to God with a yearning heart that you may take delight in His name. He will certainly fulfil your heart's desire."
The Gospel of Sri Ramakrishna, Chapter 9, Advice to the Brahmos, Sunday, April 8, 1883